Term ends Apr 27, 2038 · High confidence
20-year base term ends Dec 14, 2037
Held by Fer-Pal Construction Ltd.
Filed Dec 14, 2017 as application 15/842,339 · Granted Jun 2, 2020
Base term plus 134 days of patent term adjustment (USPTO delay)
Today
2017
2038
Clock starts
Dec 14, 2017
Dec 14, 2017
Term ends
Apr 27, 2038
Apr 27, 2038
Granted
Jun 2, 2020
Jun 2, 2020
base term
patent term adjustment
fee events
Updated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
134
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
1 of 3
Maintenance fees paid
Three maintenance fees fall due, at 3.5, 7.5 and 11.5 years from grant. This counts the ones the record shows paid.
2
Family applications on record here
Applications sharing this one's continuity chain whose file history this site holds. The family may have others.
This patent's term runs 134 days past its 20-year base term on prosecution delay. 1 of 3 maintenance fees is paid so far. Confidence: High. from the record
How we calculated this date
One row per rule, each showing its own input and what it did to the date. A step we could not verify says so instead of resolving itself.
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, 20 years from filing | Clock starts Dec 14, 2017, when this application, 15/842,339, was filed | Dec 14, 2037 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +134 days, USPTO patent term adjustment record | Apr 27, 2038 | High confidence |
| Terminal disclaimer cap | None on record | no cap applied | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 1 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Apr 27, 2038 | High confidence |
This family
| US 10,669,453 | this patent Apr 2038 | Apr 2038 |
| US 11,130,885 | In force Dec 2037 | Dec 2037 |
The applications whose file history this site holds. The family may have others.
Assignments
Assignment documents as recorded at the USPTO, oldest first, with the reel and frame each was recorded at. A recorded assignment is a filed document, not a statement of current ownership, and the absence of a later one is not evidence that the last one still stands.
| Recorded | Assignor | Assignee | Conveyance |
|---|---|---|---|
| Aug 22, 2019 Reel 50135, frame 59 | Ramsay, Gerry; McKaigue, Kendrick Shaun | Fer-Pal Construction Ltd. | Assignment of Assignor's Interest |
| Jul 8, 2024 Reel 67927, frame 470 | Fer-Pal Construction Ltd. | The Toronto-Dominion Bank | Security Interest |
| Sep 9, 2026 Reel 75958, frame 72 | Fer-Pal Construction Ltd. | The Toronto-Dominion Bank | Security Interest |
| Sep 9, 2026 Reel 76348, frame 852 | The Toronto-Dominion Bank | Fer-Pal Construction Ltd.; Sanexen Environmental Services Inc.; Niedner Inc. | Release of Security Interest |
Sources
Google Patents · The patent document at USPTO · Assignment records at USPTO
USPTO account required: This application in Patent Center · USPTO's maintenance fee lookup
Maintenance fee events come from USPTO's own fee records. Its fee lookup asks for the patent number and the application number.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
Apr 2038
Term ends Apr 27, 2038. Maintenance fees still fall due before then
Note
The 134 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
3
later US patents cite this one
That is above the median of utility patents granted in 2020 in our data, the only group it is compared against.
How we rank
Every date shows its work: the base term, any term adjustment or extension, any disclaimer cap, and the maintenance fee record, each with a confidence tier. How this record was built
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.
In force means the term is running and no lapse is on record. It is not a finding that the patent is valid.